Maximize the speed and ease of door lock and knob installation projects with the LockMatePLUS™, by Milescraft. Perfect for large jobs where time is money, the self-clamping design sets up in seconds without the need for screws or hardware. The non-marring clamp has a wide rubber surface that sets up or removes instantly, prevents slipping and protects doors. To mount the the LockmatePLUS™ simply place on door at desired location and twist the clamp. No mounting screws or hardware are required! High quality, Cobalt Alloy, Bi-metal hole saws make quick work when drilling any interior or exterior door. The bits are designed for use with any door material: wood, composite, hollow core, or metal doors. Long-lasting drill guides have a unique built-in metal bushing. The large guide’s stepped profile also helps prevent damage and extend the life of the jig. Drill from one side until the pilot tip exits the door, then continue drilling from the other side to prevent tear out.